18097345881 has 12 divisors (see below), whose sum is σ = 26983856640. Its totient is φ = 11675706840.

The previous prime is 18097345867. The next prime is 18097345897. The reversal of 18097345881 is 18854379081.

18097345881 is a `hidden beast` number, since 180 + 9 + 7 + 3 + 458 + 8 + 1 = 666.

It is not a de Polignac number, because 18097345881 - 2¹⁷ = 18097214809 is a prime.

It is a super-2 number, since 2×18097345881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18097345841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32432241 + ... + 32432798.

It is an arithmetic number, because the mean of its divisors is an integer number (2248654720).

Almost surely, 2^18097345881 is an apocalyptic number.

It is an amenable number.

18097345881 is a deficient number, since it is larger than the sum of its proper divisors (8886510759).

18097345881 is a wasteful number, since it uses less digits than its factorization.

18097345881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64865076 (or 64865073 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 18097345881 in words is "eighteen billion, ninety-seven million, three hundred forty-five thousand, eight hundred eighty-one".